Table 1.

Examples of protozoa and helminths that cause diseases in humans.

Protozoa	Helminths (Metazoa)
	Nematode	Platyhelminth
		Cestode (Flat worm)	Trematode (Fluke)
Acanthamoeba spp. Babesia bigemina Balamuthia mandrillaris Cryptosporidium parvum Cyclospora cayetanensis Entomoeba histolytica Giardia lamblia Leishmania spp. Naegleria fowleri Neobalantidium coli (formerly Balantidium coli) Plasmodium spp. Sappinia pedata Tetratrichomonas empyemagena Thelazia gulosa Toxoplasma gondii Trichomonas vaginalis Trypanosoma spp.	Ancylostoma duodenale Angiostrongylus cantonensis Ascaris lumbricoides Brugia malayi B. timori Clonorchis sinensis Dracunculus medinensis Enterobius vermicularis Gnathostoma spinigerum Loa loa Necator americanus Oncocerca volvulus Strongyloides stercoralis Trichinella spp. Wuchereria bancrofti	Dibothriocephalus latus (formerly Diphyllobothrium latum) Echinococcus granulosus Hymenolepis nana Taenia solium T. saginata	Clonorchis sinensis Fasciola gigantiga F. hepatica Opisthorchis felineus O. viverrini Paragonimus spp. Schistosoma spp.